273.74% is the change from 99 to 370
Calculation steps:
[( 370 - 99 ) ÷ 99] x 100 = 273.74%
Formula
Percentage change = [(370 - 99) / 99] x 100
Subtract the new number by the original number
370 - 99 = 271
271 ÷ 99 = 2.7373737373737375
2.7373737373737375 x 100 = 273.74%